Plaster-board.



` "9o-5,191.. i y Patented Dec.1,`19078.

S. J. KELLEY.

BLASTER BOARD.

APPLICATION FILED Amm), 1907.

STEPHEN J.4 KELIEY, OE PASSIC, NEWV JERSEY.

PLASTER-BOARD.

`Specification of Letters Patent.

Patented Dec. 1,1908.

Application mea August s, 1907. seria No. 387,606.

To all whom it mayconcem:

Be it known that I, STEPHEN citizen of the United States, residing in Passaic, Passaic county, New Jersey, have invented certain new and useful Im rovements in Plaster-Boards; and I do ereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of4 reference marked thereonfwhich form a part of thisv specification. f My invention relates to wall coverings or the likeof the kind known in the art as plaster-board. r

The principal' object of my inventionlis to provide a plaster-board which shall be capable of resisting bendin strains to a considerable de ree, substantially proof against the materia separation of its constltuent members or the disintegration of its laster portion should bending actually be' e ected, adapted to retain its original condition, intact,inthe vicinity of holes punched in it by securing nails or the like, and proof not only against the disintegrating influences of moisture but against its transmission therethrough. Y

To this end my invention consists in a plaster-board comprising as its essential elements a layer of laster or the like and a layer or layers o paper, straw, or other fibrous and tough and substantially imperforate material having a total thickness which shall at least approximate that of the plaster.

J. KELLEY, a

I am aware that plaster-board has been' heretofore made in which layers of plaster` and fibrous material have been used. One of these com rises a plurality of layers of plaster and a ternating layers of paper; another comprises a layer of plaster having' a layer of bedded incased) therein. My invention, in ope aspect thereof, distinguishes from both of these in that the fibrous body is tough and at least approximately as thick as the plaster layer. Thereby I .secure the advantage that the body.of fibrous material offers a resistance to bending strains which is proportionate to the thicknessy (and hence the susceptibility to fracture) of the plaster, in other words, it acts not merely as a carrier or holder for the plaster but as a reinl heavy paste-board boxes or aper or other fibrous material emr forcing, stiflening backing or support therefor.A This, Whether the fibrous body is i placed against one or both sides of the plaster-layer.v The further advantage is derived that when securing nails are driven into the plaster-board (the fibrous layer being then `the outer one, as is usual), the resistance of -to the enterlng nail only in the path thereof, the surrounding portion of the\plaster being unaffected because the portion ofthe fibrous material which surrounds the hole formed by the nail resists any tendency to be indented or countersunk by the entering nail; in this connection it may be said that where the plaster-board has a layer of fibrous material on both sides of the plaster layer and is not otherwise reinforced as herein stated, the outer fibrous layer should alone at least approximate in thickness the thickness of the plaster layer.

board comprising an outer layer of fibrous material, a layer of hard plastic material and a layer of adhesive water-proof material interposed between the first two layers and intimately binding them together, a plasterboard so formed being highly homogeneous and substantial in character and waterproofed in such a Way that while it prevents moisture from working through the plaster board and deleteriouslyY affecting the same it leaves the outer surface of the fibrous material in its natural state and thus well adapted to receive and hold plaster, paper lor Itllie like placed in adhering contact there- `Wit For the purpose of illustrating my invention I have shown certain forms of my improved plaster-board in the acompanying drawing', wherein,

Figure 1 shows a piece of lmy improved i plaster-board comprising two layers of fibrous material and an interposed layer Vof plastert; Fig. 2 is a sectional view of what is shown in Fig. l; and, Fig. 3 is a sectional View of a piece ofL my improved plaster board comprising a single layer of plaster 1 and a single layer of fibrous material.

In the manufact-ure of plaster-board such as is shown in the drawing, and referring first to Figs. 1 and 2, I cut heavy fibrous material, such as straw-board, card-board, or the like, of the kind used in manufacturing heavy mailing My invention further consists in a plasterthe fibrous material being proportioned to that of the plaster, the latterwill give away l tubes, into sheets of suitable size. A plaster l decorative paper or the like or another layer 60 compound is then prepared, say from plaster l or layers of plaster, of course, after the plasof paris or the like and Water, hair, wood ter-board is in position. It is fire-proof, and fiber or other fiber filaments being mixed being proof against dampness may be used therewith and rather copiously interspersed for outside Work, for instance, as a basis for therethrough; the consistency of this being the application' of stucco and other plastic 65 suoli that it Will spread readily over a surfinishes. face, it is put in a layer on one of the sheets Having thus fully described my invention, of fibrous material throughout the whole .what I claim as new and desire to secure by length and breadth thereof. They plaster Letters Patent is:

layer is then allowed to dr 2'. e., to harden, l. A plaster-board consisting of an outer 70 whereupon I coat its exposed surface with a I layer of fibrous material and a layer of hard water proofing liquid, such as paint, which plastic material adhering together, the body7 also has the property of adhesion. While i of fibrous material being at least approxithe paint is still wet, orpartially so, I lay l mately as thick as the body of plastic mathereon another sheet of the fibrous material I terial, substantially as described. 75 having of course the same dimensions as the 2. A plaster-board consisting of an outer first sheet and also having its contour correlayer of fibrous material and a layer of hard sponding with that of the first. For the purplastic material adhering together, the body 2,0 pose of imparting neatness in appearance to of fibrous material being at least approxithe finished product, so much of the plaster mately as thick as the body of plastic ma- 80 material as may project beyond the edges of terial and having fiber filaments interspersed the fibrous material may be cut away or therethrough, substantially as described. otherwise removed before it sets. The water '3. A plaster-board consisting of adhering proof' coating of paint or the like serves not layers of tough, indurated and substantially only to prevent the transmission of moisture imperf'orate fibrous material and hard plas- 85 through the plaster-board, but to prevent tic material, the body of fibrous material bemoisture from having access to the plastering at least approximately as thick as the board Which is back of it, 27. e., the layer of body of plastic material, substantially as deplaster and one layer of fibrous material, so scribed.

that the moisture will not disintegrate the 4. A plaster-board consisting of adherin 90 plaster and the back layer of fibrous material layers of tough, indurated fibrous materia and tend to destroy the adhesion between the and hard plastic material, the layer of .fibrous several layers. It will be understood, of material being the front or outer layer, and course, that the paint or water proof layer being at least approximately as thick as the maybe eliminated, the top or outer layer layer of plastic material, substantially as de- 95 shown in Fig. l being then also made to adscribed. here to the plaster layer by being placed 5. A plaster board consisting of an outer thereon before the layer sets. The fiber flalayer of fibrous material, a layer of adhesive ments may also in some cases be eliminated, water-proof material and a layer of hard if the layer or layers of fibrous material are plastic material, the layer of waterproof 100 so formed, as herein stated, as to afi'ord of material being disposed between and acting themselves the proper reinforce. In said to intimately bind together the fibrous layer Figs. l and 2 a is the first or back layer of and the plastic layer, substantially as defibrous material above referred to, the scribed.

layer of plaster, c the water proof layer, and (5. A plaster board consisting of an outer 105 (Z the front or outer layer of fibrous material. layer of fibrous material, a layer of paint and In Fig. 3, a is a layer of fibrous material a layer of hard plastic material, the layer of `and f a layer of plaster; g is a layer of paint paint being disposed between and acting to or other water proof material between the intimately bind together the fibrous layer layers c and f. The layers of the plaster and theV plastic layer, substantially as deboard shown in Fig. 3 are built up in the scribed.l 110 same manner as the layers b, o and al in Figs. In testimony that I claim the foregoing, I l and 2. As in Figs. l and 2 so in Fig. 3, the have hereunto set my hand this 5th day of water proof layer may be omitted. I August, 1907.

` It denotes the fiber filaments. STEPHEN J. KELLEY My improved plaster board is adapted to `rWitnesses: be attached as a wallcovering and thereupon JOHN W. S'rEwARn,

to receive against its exposed face either a WM. D. BELL.` 

